The DEK has all the buttons programmed..siren ,yelp,wail,hi/low, airhorn etc. When I hit the airhorn button on the dek it activates it. The airhorn button on the dek does not correlate to specific default pinout? Only reason trying find out is that the dek is mounted in the glove box and I can't reach the buttons when I'm driving. I would like to hook it up to a momentary switch